Necticut



H. L. SMITH. METAL HEADING MAGHINHE.

APPLICATION FILED APR. 30, 1921.

Patented Dec. 5,1922.

6 SHEETSSHEE'| l.

ATTOANE 7 H. L. SMITH. METAL HEADING MACHINE. APPLICATION FILED,APR- 30, 1921.

1922. s'snsi'Ts-snzn 3.

I Patented Dec. 5,

wal.

H! L. SMITH.

METAL HEADING MACHINE.

APPLICATIO l 7, Patencefi 30%. 5 1922.

I 6 SHEETSSHEET 4.

H. L. SMITH.

METAL HEADING MACHINE.

APPLICATION FILED APR. 30, 1921- 1 4379 1 Patented Dec. 5, 1922".

6 SHEETSSHEET 5. 79

ArTo/P/VEY H. L. SMITH.

METAL HEADING MACHlNE.

APPLICAHON FILED APR 30. 1921 1 ,437,9 1 8-, Patented Dec. 5, 1922.

6 SHEETS-SHEE1 6 A TTOR'NE) Patented Dec. 5, 1922.

RTE

STTES PATENT OFFICE.

HENRY L. SMITH, OF 'WA'IERBURY. CONNECTICUT, ASSIGNOR TO THE E. J. MANVILLE MACHINE COMPANY, OF "WATERBURY, CONNECTICUT,

NECTICUT.

A. CORPORATION OF" CON- llIEUllAL-HEADING MACHINE.

Application filed April 30, 1921., Serial No'. 465,824.

To (ZZZ whomit may, con-rem Be it known that l, HENRY L. SMi'rI-I. a

citiz-n of the United States. residing at simple rugged and accurately o ierating mechanism which is adapted to be used in conjunction with a double-blow open die metal heading machine of well known type for forming such shackles. v i

The invention is illustrated in connection with a heading machine of the classshown in lhiited States Patent to Campbell. No. 926,170, June 29. 1909. In such prior iua chines the stock is fed longitudinally through dies which are closed transversely and is subjected to the blows 07? two punches which are carried by a vertically .inovable slide that is mounted on a horizontally revoiproxating gate. @n one torwardmovement of the the stock is acted upon by one punch, :ud on the'next it'orward movement of the gate the stock is acted upon by the other punch. in the sliacklo-i oi mEng macl'iine the blank is fed down from above extending transversey of the machine and laid horizontally between folding dies and and then the dies are unfolded and opened to receive the next blank. v

The novel features of this invention reside in the construction and arrangement of the feeding mechanism, the dies and the of the gate,v

punch. In the accompanying drawings Fig.

1 shows a plan of the shackle-formlng mechanism and so much oil a well known heading machine as is necessary to an understanding of the relation of the improvement to such machine. Fig. 2 shows a side elevation with parts in longitudinal section of the shackle mechanism and connected parts of the machine. Fig. 3 is an elevation looking toward the shackle-forming mechanism, the machine frame being in transverse section on the plane indicated by the dotted line 8-3 on Fig. 1. Fig. d showsadetail of parts or the blank-teed operating mechanisms. Fig. 5- is a horizontal section showing the dies in the positions occupied when a shackle has been completed and'is being re moved. Fig. 6 is a similar view showing the dies in the positions occupied when a blank has been fed into them audgripped. Fig. 7 shows the dies in the positions occupied after a blank has been bent to U- shape. Fig. 8 shows the dies in the positrons occupied after the second punch has shaped the headof the shackle. 9 is-an enlarged side elevation of the dies with parts of their supports broken away; Fig. 10 is a front elevation of the same. Fig. 11 is a horizontal section on the plane indicated by the dottedlinel1'l'i on Fig. 9. Fig. 12 shows a blank. Fig. 13 the blank bentto U- shape. -Fig. 14 a completed shackle. Fig.

.15 is a detail view showing the fingersthat carry the blanks down to the dies.

The gate 1 is reciprocatedhorizontally in the frame 2 by mechanism common to double stroke heading machines for instance by such mechanism as is found in the machine illustrated in the patent above referred to. In front of this gate and carried thereby is the ordinary verticallymovable slide. 3 that is moved up and down between the reciprocationsof the gate by the usual mechanism. Secured to the ver tical slide is a forked ram i and above this is a punch 5 (Figs. 1 and 2). I

Mounted in the die pocket in the frame is a mandrel 6 that has a semi-circular groove 7 in each side-face. This mandrel forms the central die member. Back otthe mandrel isa perforatedplate 8 that is capable of a little longitudinal movement transversely of the die pocket in the frontface of the backing block 9 that is bolted in position in the die pocket. The mandrel rests upon a bracket 10 that is secured to the front of the slide plate 8 (Figs. and 9).

The dies 12 of which there are two with construction permits the grooved faces of the d es to be oscillated away i'rom the central die or mandrel on the shaft as a pivot as illustrated by dotted lines on Fig. 9 and allows the dies to be rotated about or folded back against the mandrel on the axes of the arbors from the positions illustrated in Fig. 6 to those shown in Fig. 5. Springs 21 connected between pins :22 projected from the lower ends of the carrier 16 and pins projected from the bracket tendto keep the dies closed toward the mandrel and the rotation of the gears causes the dies to unfold from parallel relation along side of the mandrel into alinement in front of the end of the mandrel.

The shaft 19 is loosely held by a bearing in a lug 2d projecting from the block 9 (Figs. 1 and 3) and has an arm 25 (Figs. 2, 3 and 11) that is connected by a knuckle 26 with an adjustable link 27 which is con neeted with one end of a lever 28 Fig. 2. The other end of the lever 28 engages and is oscillated by a cam 29 on the cam shatt 30 for rotating the gears and swinging the dies open. The eaufQS) is cut so as to nor mally swing the dies around from the sides of the mandrel to the front. .Erfter the dies have been unfolded into alinement in front of the mandrel and can swing no further owing to the coming together of their ends, the gears lock the members and further 'movement down ard of the arm 25 caused by the cam 29 swings the carrier block 16 and the die holders which it carries so as to open the dies away from the end of the mandrel. The dies are swung backward or folded around the mandrel from the positions shown in 6 to the sides of the central die or mandrel by the engagement with the backs of the dies of the forked ram 4 as shown in Fig. 7 when that tool i brought up by the forward movement of the gate and'when the slide that carries the tools is in its raised position. The backs of the die holders lt are provided with inclined grooves 31 which receive the rounded plates 32 at the ends of the forked ram '4: when that tool comes up and engages the parts for swingingthe dies around the mandrel (Fig; 7). 0

In order to guide the forked ends of the ram at and prevent them from spreading, wings 33 and 3d are arranged so as to engage the back edges of the fork when they are brought forward for swinging the dies around the mandrel. The wing 33 is secured to a plate fixed to the inside of the frame on one side of the die pocket and the wing 34 is secured to the pla'te 36 that is movably held near the inne wall ot the other side of the die pocket (Fig. 7). Non mally lying on one side of the backing lock 9 and movable horizontally along the plate 35 is a filling block 37. On the other side of the backing block and movable horizontally along the movable plate 36 a filling block 38. These blocks are slidably held to the faces of the plates and are mortised so that they may be moved out along the plates over the wings 33 and 3t from beside the backing plate 9 to the sides of the die holders as the forked rain s withdrawn so as to hold the dies from swinging open or unfolding (Fig. 8). On

the in per faces near the inner edges of the filling slides are rack teeth 39 l) and engaging with these teeth are segmental racks lO mounted on the horizontal shaft il (Figs. 2 and Fastened to one end of the shaft 41 is a lever i2 that by a link $3 is connected with a lever as (Fig. 3). This lever at the proper times moves the slides forward and back. being oscillated by a rain as on the cam shaft 30. A spring 2-6 is arranged to hold the end of the lever at against the cam (Fig. 2).

The blanks 4L7 which are sections of round rod of the correct length with their ends properly threaded are fed from a hopper 49 down an inclined track (Fig. 2,). The blanks are allowed to feed one at a time by the lifting of the cutoff gate 50 into the groove in the holder on the slide that movable in ways in a bracket 53 fastened to the top of the machine frame. The cutoff gate is mounted on a vertically-movable slide 54 that is drawn down by a spring 55 and lifted by an angle lever 56 when the lever is engageiil by a vertically-movable cam block 57 (Fig. i). The slide 52 is connected with a lever 58 which is pivoted in the bracket 53 2) and which is conneeted by a link with an angle lever 60 that is oscillated by a ram 61 on the cam shaft 30 (Fig. l). A spring 62 pulls the link 59 so as to hold the lever against the cam (Figs. 2 and 4:).

By this mechanism the slide carries the blank forward into the path of the vertically-inovable spring fingers 63 which pick up the blank and carry it down and deposit it between the dies 12 and mandrel 7 (Fig. 2). The transfer fingers are attached to a slide 6-1 that is movable up and down guideways 65 fastened to the bracket 58. A screw 66 carried by the slide and engaging a lug shown in Fig. 8.

6? on the Ways limits the downward movement of the finger slide (Fig. 2'). The slide is connected by a link 68 with the end of a lever 69 fastened to one end of the shaft 70. On the other end of the shaft 'is lever-'71 which is connected by an adjustable link '72 with the end of a lever 73 (Fig. 2) which is oscillated by a cam 74- on the cam shaft (Fig. 4). A spring 7 5 holds the lever againstthe cam. This mechanism causes the fingers to pick up a blank and carry it down and de- 3 posit it between the open dies and the mandrel, and the movement of the finger slide through the ram block 57 which it carries causes the operation of the blank releasing gate.

When a blank is between the dies and the mandrel the dies are swung on the shaft 19 fronrthe open position illustrated by the dotted lines in 9 to theclosed position shown by full lines in that I figure so as to grip the blank between the dies and the mandrel and. then with the blank in the position illustrated in Fig. 6. the fingers are drawn up out of the way. Then the .maintoolcarrying gate is advanced with the forked ram in the plane of the dies so that the ends of the forkwill engage and fold the dies back, the die holders rotating on the arbors 15. This movement of the dies bends the blank around the mandrel into the U-shape 76 as shown in"v Fig. '1' As the forked tool is withdrawn it is followed out bythe blocks 87 and 38 which fill the spaces between the die carriers and the side plates 35 and 36 as With the parts in these positions the movable side pl-a'te 36 is pushed over so as to pinehthe dies together by the plungers 77 that are forced in by the well known mechanism for closing the dies of the open die header which is fullyvset forth in the patent above referred to.

in the meantime the slide 3 has been drawn down and at the next forward movement of the main gate the punrh ,5 strikes a blow on the rounded end of the blank held in the dies and forms the head 7 8 and completes the shackle as illustrated-1n F g. 8. ga te retracts to draw back the punch the side pressure on. the dies is released and the com pleted shackle is pushed out by the rods 7 9 as shown in 5. The filling bloeks are then withdrawn and the diesunfolded and swung'open to be in position to receive the following blank The ejecting rods are attached to a plunger 80 (Fig/5) which is reciprocated by the lever .81. l A. rod 82 connerts the lever 81 with afork 83- that isengod and recinrocz-ited by a cam 84 on the earn shaft ,2); In order that the threaded ends of the shackle shall not bebattered against the ends of the ejecting rods, the plunger 80 is heldup by' one end of a lever 85, the other end of which has an adjusting screw 86 that engages with a boss 87 As the i on a disk 88 that is forced forward by buffer springs 89 (Figs. 1. and 2). i

The invention claimed is l. A. metal heading machine having a mandrel, dies adapted to be folded around the mandrel for bending and holding a blank, a reciprocatory tool for engaging and folding the dles, and a reciprocatioi'fy tool for shaping the bent blank held by the folded dies.

I 2. A metal heading machine having a mandrel, dies adapted to be folded around the mandrel for bending and holding a blank, a reeiprocatory tool movable in one plane, for engaging and folding the dies, and

a reciprocatory tool movable in the same plane, for shaping the bent blank held by gate, a tool for en a ing and foldin the t c: a h

dies, and a tool for shaping the bent blank held by the folded dies, said tools being mounted. in said slide.

5. A metal heading machine having a mandrel, dies adapted to be folded around the mandrel for bending and holding a blank, a reciprocatory tool for engaging and folding the dies, reciprocatory blocks for engaging and holding the dies folded, and a reciprocatory tool for shaping the bent hack blank held by the folded dies.

6. A metal heading machine having a mandrel, dies adapted to be swung from and toward the mandrel for receiving ablank and folded around the mandrel for bending the blank, a reciprocatory tool for engaging and folding the dies and a reciprocatory tool for shaping the bent blank held by the folded dies.

7. A metal heading machine having a mandrel, oscillatory and rotatory dies adapted to cooperate with the mandrel for bending a blank, means for oscillating the dies from and toward the mandrel, and -means for ro-- tating the dies around the mandrel. I

"8.. A metal heading machine having a mandrel, dies adapted to be swung from and toward the mandrel. for receiving a blank,

and folded around the mandrel for bending the blank, a reciprocatory tool for engaging and folding the dies, reciprocatory blocks for engaging and holding the dies folded, and a reciprocatory tool for shaping the bent blank held by the folded dies.

9. All metal heading machine having a mandrel, dies adapted to be swung from and toward the mandrel for receiving ablank, and folded around the mandrel for bending the blank, a reciprocatory tool for engaging and folding the dies, mechanism for first unfolding the dies and then swinging the dies from the mandrel, and a reciprocatory tool for shaping the bent blank held by the folded dies.

10. A metal heading machine having a mandrel, dies adapted to be swung from and toward the mandrel for receiving a blank, and folded around the mandrel for bending the blank,.a forked tool for engaging the backs of and folding the dies about the mandrel, and a reciprocatoi'y tool for shaping the bent blank held by the. folded dies.

ll. A. metal heading machine having a mandrel, dies adapted to be folded around the mandrel for bending and holding a blank, a reciprocatory tool for engaging and folding the dies, reciprocatory blocks for engaging and holding the dies folded, means for forcing the dies and mandrel together transversely between said blocks, and a reciprocatory tool for shaping the bent blank held by the folded dies.

12. A metal heading machine having a mandrel, oscillatory and rotary dies adapted to be swung and folded around the mandrel for bending and holding a blank, a reciprocatory tool for engaging and folding the dies, reciprocatory blocks for engaging and holding the dies folded, means for forcing the dies and mandrel together transversely between said blocks, and a reciprocatory tool for shaping the bent blank held by the folded dies.

13. A metal heading machine having a mandrel, rotary dies adapted to cooperate with the mandrel for bending a blank, means for rotating the dies around the mandrel, and a transversely movable slide carrying said mandrel and the dies.

14:. A metal heading machine having a mandrel, oscillatory and rotatory dies adapted to cooperate with the mandrel for bending a blank, means for oscillating the dies toward and from the mandrel, means for rotating the dies around the mandrel, and. a transversely movable slide carrying said mandrel the dies and oscillating means.

15. A metal heading machine having a mandrel, dies adapted to be folded around the mandrel for bending and holding a blank, a reciprocatory tool for engaging and folding the dies, reciprocatory blocks for engaging and holding the dies folded, a transversely movable slide carrying said mandrel and dies, mechanism for moving said slide transversely, and a reciprocatory tool for shaping the bent blank held by the folded dies.

16. A metal heading machine having a mandr dies adapted to be folded around if r be; I 'ng and holding a blank, a reciprocatory tool for engaging and folding the dies, reciprocatory blocks for engaging and holding the dies folded, atransversely movable slide carrying said mandrel and dies,

mechanism for moving one of said blocks transversely against the dies, and a reciprooatory tool for shaping the bent blank held by the folded dies.

17.. 1 meta-l heading machine having a mandrel, oscillatory and rotatory dies adapted to cooperate with the mandrel for bending and holding a blank, and means for oscillating and rotating the dies.

18. A metalheading machine having a mandrel, dies adapted to cooperate with the mandrel for bending and holding a blank, rotatory die holders, and an oscillatory carrier supporting said rotatory die holders.

19. A metal heading machine having a mandrel, dies adapted to be folded around the mandrel for bending and holding a blank, a reciproca-tory tool for engaging and folding the dies, a reciprocatory tool for shaping the bent blank held by the folded dies, and means for ejecting the shaped block from the dies before the dies are unfolded.

20. A. metal heading machine having a mandrel, dies adapted to be folded around the mandrel for bending and holding a. blank, a reciprocatory tool for engaging and folding the dies, means for squeezing the dies together transversely, a reciprocatory tool for shaping the bent blank held by the folded dies, and means for ejecting the shaped blank from the dies before the dies are unfolded.

21. A metal heading machine having a mandrel, dies adapted to be opened from the mandrel and folded around the mandrel, means for feeding a blank between the mandrel and dies when the dies are unfolded, means for folding the dies around the mandrel and bending the blank, and means for ejecting the bent blank before the dies are unfolde l.

22, A metal heading machine having a mandrel, dies adapted to be folded around the mandrel, means for feeding a. blank between the mandrel and dies when the dies are unfolded, means for folding the dies around he manorel and bending the blank, and means for ejectin the bent back blank before the dies are unfolded.

A metal heading machine having a mandrel, dies adapted to be folded around the mandrel, means for feeding a blank between the mandrel and dies when the dies are unfolded, means for folding the dies around the mandrel and bending the blank, and means for ejecting the bent blank from the dies.

HENRY L. SMITH. 

